---
title: "_AppendKeyPath"
layout: "default"
description: "Swift documentation for '_AppendKeyPath'"
root: "/v5.1"
keywords: ""
---

<div class="intro-declaration"><code class="language-swift">protocol _AppendKeyPath</code></div><p>An implementation detail of key path expressions; do not use this protocol
directly.</p>
<table class="standard"><tr><th id="conforming-types">Conforming Types</th><td><code class="inherits">AnyKeyPath</code></td></tr></table><div class="discussion comment"></div>